new copyright; att/bsd/shared

[unix-history] / usr / src / lib / libc / string / ffs.c

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)ffs.c	5.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <string.h>

/*
 * ffs -- vax ffs instruction
 */
ffs(mask)
	register int mask;
{
	register int bit;

	if (mask == 0)
		return(0);
	for (bit = 1; !(mask & 1); bit++)
		mask >>= 1;
	return(bit);
}